Buy an alpine animal or a sabre tooth tiger. Then buy an iceberg from the "Animal Enrichment" menu. If you are lucky, then there will be a caveman inside. Go to the guest list and click him. Click the "Pick up" command and drop him inside your zoo. He will act like any other guest. Do not sell the iceberg or the caveman will disappear.
Creating deep water
Use the cliff creator to make a cliff. Add deep water on top of the cliff. Then in the deep water, use the ditch creator.
Crouch position in photos
When in Photo mode, press X and you will be placed into a "crouch" position, allowing a very good view for pictures. Note: You must keep X held when you are taking the picture.
Fast zookeeper
In Zookeeper mode, click the Left Mouse Button to go slightly faster, then press [Up] to run, and finally hold [Shift] to sprint.
Move through walls
Take out your Fossil Finder. Hold [>] then hold [Shift]. While holding both keys, press [?]. The game will pause in Zoo Guest mode, and you can run through walls or buildings.
Mutant animals
Get a low score in the "Animal Creation" mini-game for a chance of one of the following mutant animals. Note: All of these animals are only selectable ambients except for the Killer Penguin.
Giant Bullfrog
Giant Monarch Butterfly
Killer Penguin
Red Squirrel
Springhare
Mysterious kangaroo
Place a male and a female Veloceraptor, the desert ones, and wait until they mate and the female is pregnant. She will start building a nest. You will be informed when the nest is being built in the top information bar. Click on the female Veloceraptor. Click on its picture to track it. When it is done building its nest it will lay an egg. Just when it lays the egg, somewhere in its exhibit a baby kangaroo will slowly rise up from the ground and eventually disappear. This can happen even if you do not have any kangaroos. However this glitch does not always work; just every once in a while when the Velociraptor lays eggs.
Quagga
Release all the extinct animals into the wild.
Scare the world
Enter the "Freeform", "Challenge", or "Campaign" menu. Spin the globe several times quickly to hear screaming. Stop spinning the globe and the screaming will continue until it stops.
Super dinosaur
Once you have cured one of your diseased animals, buy a lab. Click it then click "Find Fossils". You will see an "X" mark on your right. It is at the middle right. After you click it, you will have a Fossil Detector. The fossil detector also can be upgraded by digging upgrades or by getting more fame for the zoo. Once you get all the fossils, go back to the lab and click "Build Fossil". Once you put it back, click "Build Extinct Animal". You will see keyboard keys. Press them once the green line is touching them. Once you get them all correct, your score will be 100% and you will have a super dinosaur.
World Terror
At the freeform, challenge, or campaign menu of the game, spin the globe several times quickly and you'll begin to hear screaming. Stop spinning it and they'll continue to scream until it stops. Congrats, you have officially scared man kind.
Zookeeper Mode Speeds
Click the left mouse button down to go slightly faster, then up on the keybord to run, and finally hold shift to sprint.
